Company Filing Deadlines UK 2026: A Complete Guide
13 August 2026
Miss your company filing deadline? Learn the exact Companies House dates for accounts and confirmation statements in 2026, plus penalty fees and how to avoid them.
What Are the Key Company Filing Deadlines in the UK?
Every private limited company in the UK must file certain documents with Companies House each year. The two most critical deadlines are for your annual accounts and your confirmation statement. For a private limited company, annual accounts are due 9 months after your accounting reference date (usually the last day of your financial year). Public limited companies have a shorter period: 6 months. Your confirmation statement is due 14 days after the end of its review period, which is typically 12 months from the company's incorporation anniversary. Missing either deadline can result in automatic penalties, strike-off proceedings, and damage to your credit rating, so it pays to know exactly where you stand.
Annual Accounts: How to Calculate Your Filing Deadline
Your annual accounts deadline depends on your company's accounting reference date (ARD). This is normally the anniversary of the last day of the month in which your company was incorporated. For most private limited companies, filings are due exactly 9 months after the ARD. For example, if your ARD is 31 March, your deadline is 31 December of the same year. If your company is new and was incorporated during a month, you can also request to change your ARD to extend the first filing period, but you can only do this within certain limits and for a limited number of times. You must always file accounts with Companies House, even if your company is dormant, and HMRC may also require separate Corporation Tax accounts.
Confirmation Statement: The Annual Check-In You Can't Ignore
The confirmation statement is not a set of accounts; it is a snapshot of your company's information held by Companies House. It confirms that your registered office, directors, shareholders, and people with significant control are correct. The deadline is 14 days after the end of your confirmation review period, which is usually the anniversary of your company's incorporation. If the information has not changed, you simply confirm it and pay the £34 filing fee (or £13 if filing electronically after April 2025 — check current fees). Failure to file on time is a criminal offence and Companies House may eventually strike off your company. You do not need to file a confirmation statement if you are a company that has dissolved or is exempt, but these cases are rare.
Late Filing Penalties: What Will It Cost You?
Penalties for late filing of accounts are automatic and scale with how late you are. For a private limited company, filing up to 1 month late costs £150; 1 to 3 months late costs £375; 3 to 6 months costs £750; more than 6 months costs £1,500. These are doubled if you file two years in a row. Public limited companies and LLPs face much higher fines. The confirmation statement has a fixed penalty of £250 (if filed late via post) or £200 (if filed online within 14 days of the deadline) — but the exact fee structure changed in 2025, so always check Companies House guidance. Late filing penalties are separate from any failure to pay Corporation Tax, which is dealt with by HMRC.
Five Practical Tips to Avoid Missing Your Filing Deadline
First, set calendar reminders for at least a month before your accounts and confirmation statement deadlines. Second, file online through the Companies House service as it's faster and you get instant confirmation. Third, consider aligning your accounting reference date with the tax year to simplify your records. Fourth, use a good accountant or formation agent who can manage compliance for you — their fees are often lower than a single late penalty. Finally, if you're struggling to file on time, you can apply to shorten your accounting reference period (to bring the deadline forward) or, in exceptional circumstances, for a one-off extension, though this is rarely granted. Acting early is always better than reacting late.
FAQ
For a private limited company registered in England, Wales, Scotland, or Northern Ireland, your annual accounts must reach Companies House within 9 months of your accounting reference date. For example, if your company's financial year ends on 31 December, you have until 30 September the following year to file.